# 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool

**Cummins 5.9 L Heat Exchanger MEC 4020101CN Replacement**

4" x 25"-3/4" (4" Diameter x 25.68" long shell, copper nickel core).

Copper nickel (CUNI) for superior erosion resistance in salt water applications.

Replaces Cummins 4020101 on late models Cummins 5.9L, 6 Cylinder Engines.

This is an aftermarket part by **Mr Cool (USA) MRC4020101CN** .

Packing/Box size 91 x 26 x 21 cm - Weight Aprox 13.5 Kgs

Replacement Anode MEZ 9-034.

## Details

- **Price:** 2568.5 AUD
- **Vendor:** Mr Cool
- **Tags:** Sawley’s AAM Aftermarket – Cooling Systems Mr Cool | Marine Heat Exchangers & Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2568.50 AUD | In stock |

## Images

- 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool
- 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool
- 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool
- 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool
- 4020101CN Cummins 5.9L / QSB Heat Exchanger 4020101CN 4x25 Replacement Mr Cool

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/4020101cn-cummins-5-9l-qsb-heat-exchanger-4020101cn-4x25-replacement-mr-cool)
> Updated: 2026-06-23